689392243 has 2 divisors, whose sum is σ = 689392244. Its totient is φ = 689392242.

The previous prime is 689392213. The next prime is 689392247. The reversal of 689392243 is 342293986.

689392243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689392243 - 2²⁵ = 655837811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689392193 and 689392202.

It is not a weakly prime, because it can be changed into another prime (689392247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344696121 + 344696122.

It is an arithmetic number, because the mean of its divisors is an integer number (344696122).

Almost surely, 2^689392243 is an apocalyptic number.

689392243 is a deficient number, since it is larger than the sum of its proper divisors (1).

689392243 is an equidigital number, since it uses as much as digits as its factorization.

689392243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 689392243 is about 26256.2800678238. The cubic root of 689392243 is about 883.3960726135.

The spelling of 689392243 in words is "six hundred eighty-nine million, three hundred ninety-two thousand, two hundred forty-three".